Abstract
A novel (E,E)-dioxime,5,6:13,14-di(4′-t-butylbenzo)-2,3-bis(hydroxyimino)-8,11-dithia-1,4-diazacyclotetradecane (H2L), containing a 14-membered dithiadiaza macrocyclic unit has been synthesized by the reaction of 1,2-bis(4-t-butyl-2-aminobenzylthio)ethane (1) and cyanogendi-N-oxide (2). A mononuclear nickel(II) complex (3) with a metal : ligand ratio of 1 : 2 was also prepared. A heterotrinuclear complex [Cu2Ni(HL)2](PF6)2 (4) was synthesized by using the mononuclear complex 3 and [Cu(CH3CN)4]PF6. A heteropentanuclear complex [Cu2(UO2)2(phen)2Ni(HL)2](PF6)2(NO3)2 (5) containing the oximato tetraanion as a bridging ligand and 1,10-phenanthroline as an end-capping ligand was obtained by using the heterotrinuclear ligand for the Cu2 center. The ligand and its complexes have been characterized by 1H and 13C NMR, IR and mass spectroscopy, elemental analysis and semiempirical quantum chemical calculations.
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